Safari Van M V6-262 4.3L (1985)
Air Door: Customer Interest
A/C - Insufficient System Cooling
NUMBER:
86-B-113
GROUP:
1B-Air Conditioning
DATE:
August, 1986
SUBJECT:
INSUFFICIENT COOLING FROM AIR CONDITIONING SYSTEM
MODELS:
1985-1986 M VANS
Complaints may be received on 1985-1986 M vans of insufficient cooling from the air conditioning (A/C) system. The following procedures and
modifications can be performed to increase the amount of airflow and cooling from the A/C system. This bulletin is divided into two (2) sections, C60 -
Front A/C only and C69 - Front/Rear A/C.
SERVICE PROCEDURES
C60 - FRONT A/C ONLY
The following checks should be made to verify the A/C system is working normally.
1.
Verify that the compressor operates normally.
2.
Verify correct refrigerant charge - use the insufficient cooling "quick check" procedure on Page 1B-7 of the service manual, 3. System operation -
check system operation (performance) test using procedures on Page 1B-7.
4.
Temperature Door Adjustment - move the temperature lever rapidly back and forth from hot to cold. listen for the temperature door hitting the
heater case in both modes. A misadjusted temperature door can allow heated air into the A/C air raising the outlet temperature. If the door needs
adjusting, use the temperature cable adjustment on Page 1B-32 (86 manual), 1B-17 (85 manual).
If the system checks normal, the following modifications can be used to increase the cooling performance of the A/C system.
5.
Add 1/4 lb. of R-12 refrigerant to the system. This will increase the total charge to 1.02 kg (2.25 lbs.). Caution: Use proper safety equipment to
prevent personal injury when charging the A/C system.
6.
Replace the heater A/C motor with P/N 22021790. This motor operates at higher speed in all ranges. This will increase the air flow into the
vehicle. Use procedures on Page 1B-29 (86 manual), 1B-19 (85 manual).
Baffle Modification
7.
Remove right, left, and center A/C outlets. Remove material from right and right center duct baffles (See Figure No. 1).
